// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CC_LAYERS_VIDEO_LAYER_IMPL_H_
#define CC_LAYERS_VIDEO_LAYER_IMPL_H_

#include <vector>

#include "base/macros.h"
#include "cc/base/cc_export.h"
#include "cc/layers/layer_impl.h"
#include "cc/resources/release_callback_impl.h"
#include "cc/resources/video_resource_updater.h"
#include "media/base/video_rotation.h"

namespace media {
class VideoFrame;
}

namespace cc {
class VideoFrameProvider;
class VideoFrameProviderClientImpl;

class CC_EXPORT VideoLayerImpl : public LayerImpl {
public:
    // Must be called on the impl thread while the main thread is blocked. This is
    // so that |provider| stays alive while this is being created.
    static std::unique_ptr<VideoLayerImpl> Create(
        LayerTreeImpl* tree_impl,
        int id,
        VideoFrameProvider* provider,
        media::VideoRotation video_rotation);
    ~VideoLayerImpl() override;

    // LayerImpl implementation.
    std::unique_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
    bool WillDraw(DrawMode draw_mode,
        ResourceProvider* resource_provider) override;
    void AppendQuads(RenderPass* render_pass,
        AppendQuadsData* append_quads_data) override;
    void DidDraw(ResourceProvider* resource_provider) override;
    SimpleEnclosedRegion VisibleOpaqueRegion() const override;
    void DidBecomeActive() override;
    void ReleaseResources() override;

    void SetNeedsRedraw();
    media::VideoRotation video_rotation() const { return video_rotation_; }

private:
    VideoLayerImpl(
        LayerTreeImpl* tree_impl,
        int id,
        scoped_refptr<VideoFrameProviderClientImpl> provider_client_impl,
        media::VideoRotation video_rotation);

    const char* LayerTypeAsString() const override;

    scoped_refptr<VideoFrameProviderClientImpl> provider_client_impl_;

    scoped_refptr<media::VideoFrame> frame_;

    media::VideoRotation video_rotation_;

    std::unique_ptr<VideoResourceUpdater> updater_;
    VideoFrameExternalResources::ResourceType frame_resource_type_;
    float frame_resource_offset_;
    float frame_resource_multiplier_;
    uint32_t frame_bits_per_channel_;

    struct FrameResource {
        FrameResource(ResourceId id,
            gfx::Size size_in_pixels,
            bool is_overlay_candidate)
            : id(id)
            , size_in_pixels(size_in_pixels)
            , is_overlay_candidate(is_overlay_candidate)
        {
        }
        ResourceId id;
        gfx::Size size_in_pixels;
        bool is_overlay_candidate;
    };
    std::vector<FrameResource> frame_resources_;

    // TODO(danakj): Remove these, hide software path inside ResourceProvider and
    // ExternalResource (aka TextureMailbox) classes.
    std::vector<unsigned> software_resources_;
    // Called once for each software resource.
    ReleaseCallbackImpl software_release_callback_;

    DISALLOW_COPY_AND_ASSIGN(VideoLayerImpl);
};

} // namespace cc

#endif // CC_LAYERS_VIDEO_LAYER_IMPL_H_
